[Biturbos4] Throttle position sensor problem

Brett Dikeman quattro at frank.mercea.net
Sun Oct 26 10:05:58 PDT 2008

On Oct 26, 2008, at 11:17 AM, Grant Lenahan wrote:

> 1. clean with carb cleaner by spraying inside the TB
> 2. loosen/clean the TB inside by exercising the butterfly completely
> through its angle of motion, several times, quickly. This creates a
> wiping action.

1.Make sure to use throttle/carb cleaner, not brake cleaner, which  
could destroy plastic bits and does not contain any lubricants.

2.If you can get to the potentiometer, hit it with Caig's MoveIT  
moving contact cleaner.  If it is an enclosed potentiometer, really  
get it covered- some will work its way in to the contacts.  Actuate it  
a bunch of times, then use compressed air to blow it clean, repeat  
once or twice.  As long as the tracks are just dirty, it should work  
great afterwards. If they're damaged, well...then you're kinda  
screwed, unless you can find a very close replacement for the pot.

Since gunk will affect the resting position of the throttle, it may be  
beneficial to re-calibrate the throttle?


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